Basement wall Styrofoam with concrete embedding

  • Erstellt am 2011-12-10 23:31:42

EDKA

2011-12-10 23:31:42
  • #1
Hello,
I have a question
My basement is constructed as follows.
First, the external formwork is set up, then you attach Styropor 8cm (not Styropor) to it, after that (I am not exactly sure) iron mesh and internal formwork, and then it is concreted. A big advantage according to my builder is that the Styropor does not have to be glued after the basement is finished and the basement is 100% watertight. I have been on several construction sites and after concreting, the black sealing compound was always applied twice first and then Styropor was glued on. Is this a new procedure and is the basement 100% watertight and what disadvantages does it have?

In short, this is how my basement wall looks from you from the outside. Concrete wall - Styropor 8cm - dimpled membrane.

Thank you in advance for the answer
 

CADAMaRa

2011-12-11 12:03:50
  • #2
Hello EDKA,

well, this described procedure is also not known to me. However, our cellars are built differently (precast concrete parts with cast-in-place concrete). When our cellar outer walls are erected and poured, first a cove (sealing the intersection of the floor slab and outer wall) is made, then the bitumen coating, and only then the insulation is applied. I would have concerns about the clean closure of the floor slab / outer wall with directly embedding the insulation in concrete. Normally, cellars are sealed against ground moisture only by the already mentioned bitumen coating. For waterproofing against pressing water, a so-called "white tank" has to be built. This is much more complex and more expensive than a "black tank". So it’s better to ask again exactly what advantages and disadvantages your procedure is supposed to have. I’m already looking forward to the answer.

Best regards CADAMaRa
 

Bauexperte

2011-12-11 12:28:46
  • #3
Hello,


To be honest, what you have explained here does not make sense to me or I am currently at a loss.

Who is your construction manager and what does the soil report or the structural engineer say about the execution of the WU basement?

Best regards
 

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